package main

import "fmt"

func main() {
	var m1 map[int]string
	//m1[1] = "go"
	fmt.Println(m1)

	m2 := make(map[int]string)
	//m2[1] = "java"
	fmt.Println(m2)

	m3 := make(map[int]string, 2)
	m3[1] = "mike"
	m3[2] = "go"
	m3[3] = "c++"

	fmt.Println("m3 = ", m3)
	fmt.Println("len(m3)", len(m3))

	m4 := map[int]string{1: "java", 2: "go", 3: "node"}
	fmt.Println(m4)

}
